X performance problems with Matrox G550

[Martin Ebourne]

On Thu, 2004-11-04 at 13:53, Thomas Winischhofer wrote:
> Martin Ebourne wrote:
> (WW) MGA(0): Failed to set up write-combining range (0xd8000000,0x2000000)
> 
> 
> MTRR support in your kernel seems to be disabled.

Sorry but that doesn't make sense to me. I described in that email how I
could add a write-combining range manually by using:

# echo "base=0xd8000000 size=0x2000000 type=write-combining" >| /proc/mtrr
# cat /proc/mtrr
reg00: base=0x00000000 (   0MB), size= 512MB: write-back, count=1
reg01: base=0xd0000000 (3328MB), size= 128MB: write-combining, count=1
reg02: base=0xd8000000 (3456MB), size=  32MB: write-combining, count=1

Surely if the kernel support was disabled that wouldn't work?

Cheers,

Martin.